December weather forecast
North Henderson, IL

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Weather in December

The first month of the winter, December, is also a wintry month in North Henderson, Illinois, with an average temperature fluctuating between 24.6°F (-4.1°C) and 35.4°F (1.9°C).

Temperature

North Henderson's weather in December involves a decrease in the average high-temperature, moving down from November's chilly 47.5°F (8.6°C) to a cold 35.4°F (1.9°C). North Henderson cools down to an average low-temperature of 24.6°F (-4.1°C) throughout the month of December.

Humidity

In December, the average relative humidity is 81%.

Rainfall

January and December are months with the least rain when the rain falls for 4.5 days and typically aggregates up to 0.47" (12mm) of rain.

Snowfall

January through April, October through December are months with snowfall. In December, it is snowing for 6 days. Throughout December, 0.43" (11mm) of snow is accumulated. Throughout the year, there are 28 snowfall days, and 4.53" (115mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of December, sunrise is at 7:08 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:43 pm CST.

Sunshine

In December, the average sunshine is 4.4h.

UV index

With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, the maximum UV index of 1 transforms into these recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Updated: Jun 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

North Henderson in December has an average high-temperature of 35.4°F (1.9°C) and an average low-temperature of 24.6°F (-4.1°C). In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, is computed to be 86°F (30°C).

What is the average humidity in December?

The average relative humidity in December is 81%.

What is the driest month?

The months with the least rainfall in North Henderson are January and December Rain falls for 4.5 days and accumulates 0.47" (12mm) of rain.

How many days does it rain in December?

In North Henderson, during December, the rain falls for 4.5 days and regularly aggregates up to 0.47" (12mm) of precipitation.

How much does it snow in December?

In North Henderson, in December, during 6 snowfall days, 0.43" (11mm) of snow is typically accumulated.

What is the month with the shortest days?

The month with the shortest days in North Henderson is December, with an average of 9h and 18min of daylight.

How many hours of daylight does North Henderson have in December?

The average day length in December is 9h and 17min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:08 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:43 pm CST.

How long on average sun shines in December?

In North Henderson, the average sunshine duration in December is 4.4h.

When is the lowest UV index?

With an average maximum UV index of 1, December is the month with the lowest UV index.

What is the UV index intensity in December in North Henderson?

The average daily maximum UV index in December is 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
North Henderson, IL

Average temperature in December - North Henderson, IL
  • Average high temperature in December: 35.4°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (29.5°F).

  • Average low temperature in December: 24.6°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).

Average pressure in December
North Henderson, IL

Average pressure in December - North Henderson, IL
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in December
North Henderson, IL

Average wind speed in December - North Henderson, IL
  • Average wind speed in December: 9.9mph

The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).

Average humidity in December
North Henderson, IL

Average humidity in December - North Henderson, IL
  • Average humidity in December: 81%

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).

Average rainfall in December
North Henderson, IL

Average rainfall in December - North Henderson, IL
  • Average rainfall in December: 0.47"

The wettest month (with the highest rainfall) is May (1.65").
The driest months (with the least rainfall) are January and December (0.47").

Average rainfall days in December
North Henderson, IL

Average rainfall days in December - North Henderson, IL
  • Average rainfall days in December: 4.5 days

The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is February (3.9 days).

Average snowfall in December
North Henderson, IL

Average snowfall in December - North Henderson, IL
  • Average snowfall in December: 0.43"

The month with the highest snowfall is January (1.38").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
North Henderson, IL

Average snowfall days in December - North Henderson, IL
  • Average snowfall days in December: 6 days

The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
North Henderson, IL

Average daylight in December / Average sunshine in December - North Henderson, IL
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 4h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

Average sunshine days in December
North Henderson, IL

Average sunshine days in December - North Henderson, IL
  • Average sunshine days in December: 21.6 days

The month with the most sunshine days is December (21.6 days).
The month with the least sunshine days is June (12.4 days).

Average UV index in December
North Henderson, IL

Average UV index in December - North Henderson, IL
  • Average UV index in December: 1

The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
North Henderson, IL

Average cloud cover in December - North Henderson, IL
  • Average cloud cover in December: 54

The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 30).

Average visibility in December
North Henderson, IL

Average visibility in December - North Henderson, IL
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).

North Henderson, Illinois, USA

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